根据Bos taurus公牛在亚热带气候中的生理和生产能力,确定最有效的阴影系统
Leonel Avendaño-Reyes1, Ulises Macías-Cruz2, M Ángeles López-Baca1
1Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Mexicali, 21705, Baja California, México.
International journal of biometeorology
|May 22, 2025
概括
对于经历中度热应激的Bos taurus公牛来说,最好的遮阳系统是带有风扇的圆顶. 该系统改善了温度调节,代谢活动和料效率,从而提高了整体性能.
科学领域:
- 动物科学动物科学
- 环境生理学环境生理学
- 农业工程 农业工程
背景情况:
- 牛在亚热带气候中容易受到热应激,这会影响它们的福祉和生产力.
- 有效的阴影管理对于减轻热应激和优化牲畜表现至关重要.
- 之前的研究已经评估了各种阴影结构,但对于中度热应激条件的最佳解决方案需要进一步研究.
研究的目的:
- 评估四种不同的阴影系统在改善Bos taurus公牛在中度热应激下生理和生产反应方面的有效性.
- 确定最有效的阴影系统,以提高牛的温度调节,新陈代谢状态和料场性能.
主要方法:
- 804只Bos taurus,Bos indicus和杂交公牛被分配到12个圈子中,每次治疗有3个圈子:常规阴影 (CSS),双阴影 (DSH),没有风扇的圆顶 (DNF) 和带风扇的圆顶 (DWF).
- 评估了生理参数 (呼吸频率,表面温度,血中代谢物,如三甲氨酸和葡萄糖) 和生产反应 (料区的性能,尸体特征,肉质).
- 环境条件的特征是温和的热应激.
主要成果:
- 顶式风扇 (DWF) 系统在多个身体区域产生了最低的呼吸频率和表面温度.
- 在DWF下的公牛表现出较高的三甲状腺素度,这表明代谢活动有所改善.
- 虽然DNF公牛的料摄入量最高,但DWF和DSH系统与CSS相比显示出更高的料效率. 在CSS和DSH群体中,肉质的质量较高,而CSS公牛的肉质比DNF和DWF群体轻.
结论:
- 有风扇的圆顶 (DWF) 是Bos taurus公牛在中度热应激下最有效的阴影系统.
- 粉显著增强温度调节和代谢活动,从而提高料效率.
- 推实施像DWF这样的先进阴影解决方案,以优化热压环境中的牛产量.
相关概念视频
Adaptations that Reduce Water Loss
25.0K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.0K
Photoreceptors and Plant Responses to Light
20.0K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.0K
Types of Selection
39.9K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
39.9K
Limits to Natural Selection
31.0K
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
31.0K
What is Natural Selection?
114.1K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
114.1K
Responses to Heat and Cold Stress
13.3K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.3K


